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  • 1985-1989  (6)
  • 1
    Digitale Medien
    Digitale Medien
    Mutagenic activity of two soils amended with a wood-preserving waste (1987)
    s.l. : American Chemical Society
    Environmental science & technology 21 (1987), S. 57-64 
    Details
    ISSN: 1520-5851
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Energietechnik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/es00155a006
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  • 2
    facet.materialart.
    Unbekannt
    Duty, character and the rights-theory of morals (1987)
    The Hague : Periodicals Archive Online (PAO)
    The Journal of Value Inquiry. 21:4 (1987) 317 
    Details
    ISSN: 0022-5363
    Thema: Philosophie
    Notizen: Discussions
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:n252-1987-021-04-000006
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  • 3
    Digitale Medien
    Digitale Medien
    Phycobilisomes of wild type and pigment mutants of the cyanobacterium Synechocystis PCC 6803 (1986)
    Springer
    Archives of microbiology 146 (1986), S. 186-191 
    Details
    ISSN: 1432-072X
    Schlagwort(e): Cyanobacteria ; Synechocystis PCC 6803 ; Phycobilisome structure ; Pigment mutants
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Mutants affected in their pigment content and in the structure of their phycobilosomes (PBS) were isolated in the cyanobacterium Synechocystis PCC 6803 by enriching a population with the inhibitor p-hydroxymercuribenzoate. Three of these mutants, PMB 2, PMB 10 and PMB 11, with original phenotypes, are described. Applying several criteria of analysis (77K absorption and fluorescence, protein electrophoretic patterns, electron microscopy), it was possible to assign the component polypeptides to each substructure of the phycobilisome. The model structure obtained fits with those described in other species PMB 10 and PMB 11, completely lacking PC, are the first source of pure PBS cores available, in which no contamination by residual PC can be feared, and are thus particularly interesting for further biochemical studies. The capacity of genetic transformation of Synechocystis PCC 6803 by chromosomal DNA makes this system very convenient for the analysis of the regulation of synthesis of the PBS constituents.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00402349
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  • 4
    Digitale Medien
    Digitale Medien
    Mutagenic potential of municipal sewage sludge amended soils (1989)
    Springer
    Water, air & soil pollution 48 (1989), S. 435-449 
    Details
    ISSN: 1573-2932
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract This study was conducted to measure the mutagenic potential of municipal sewage sludge amended soil. Two separate sludge samples were collected from one municipal wastewater treatment plant and applied to undisturbed soil lysimeters over a 9 mo interval. Soil and sludge samples were collected for approximately 2 yr following sludge application. Samples were solvent extracted using methylene chloride and methanol, and the bacterial mutagenicity of the resulting residue determined using the Salmonella/microsome assay. The maximum specific activity of the sludge amended soil was 416 net revertants per 10 mg of residue induced by the methanol fraction extracted from the Weswood soil collected 154 d following the first sludge application. In the Padina sand, the maximum specific activity was 320 net revertants per 10 mg of residue induced by the methanol fraction extracted from the sample collected 154 d following the first sludge application. The specific activity of the sludge amended soil was observed to decrease slowly with time. For both the Padina and the Weswood soils, mutagenic organic chemicals were detected in soil samples collected 510 d following the second sludge application. For the Weswood soil, the mutagenic activity per unit weight of soil with metabolic activation of the samples collected 510 d after the final sludge application was decreased by 15 and 76% for the methylene chloride and methanol fractions, respectively, when compared to the maximum weighted activity observed 56 d after the final sludge application. The results indicate that municipal sewage sludges may contain organic mutagens which are persistent in the soil.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00283341
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  • 5
    Digitale Medien
    Digitale Medien
    Distribution of inorganic constituents in soil following land treatment of refinery wastes (1985)
    Springer
    Water, air & soil pollution 25 (1985), S. 285-300 
    Details
    ISSN: 1573-2932
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract To assess the impact of long term land treatment, soil profile samples were collected from treated and untreated sites at five refinery land treatment facilities. All samples were analyzed for texture, cation exchange capacity (CEC), specific conductance (EC), Na saturation (ESP), Na absorption ratio (SAR), pH, As, Cd, Cr, Hg, Pb, Ni, and V. Data show that land treatment of refinery waste had no effect on soil texture or CEC. Some sites showed small increases over background EC values of the surface 30 cm of soil. Depending on the waste characteristics and management practices, the soil pH may increase or decrease as a result of land treatment of refinery waste. Only one site was found with coil pH less than 6.5. At this site, Cr and Pb were detected below the zone of incorporation at concentrations above untreated soil. However, metal levels within the zone of incorporation at all sites remained within the ranges considered common for natural soil.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00208455
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  • 6
    Digitale Medien
    Digitale Medien
    Mutagenic activity of soils amended with two refinery wastes (1986)
    Springer
    Water, air & soil pollution 29 (1986), S. 1-13 
    Details
    ISSN: 1573-2932
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract The mutagenic potential of the acid, base, and neutral fractions of petroleum sludge amended soil was determined using the Salmonella/microsome assay and Aspergillus methionine assay. Organic compounds were extracted from two different soils amended with either storm-water runoff impoundment or combined API-separator/slop-oil emulsion solids waste. Application of either waste to soil reduced the mutagenic activity of organic compounds extracted from equal weights of soil. However, biodegradation increased both the total and the direct-acting mutagenicity of all fractions residual in the waste-amended soil. The maximum level of mutagenic activity per milligram residual C was detected in the sample collected 360 days after waste application for the acid and base fractions from the storm-water runoff impoundment amended soils and the acid, base, and neutral fractions of the combined API separator/slop-oil emulsion waste amended soils. A comparison of the results based on equivalent weights of soil indicates that the mutagenic potential of both wastes was reduced by soil incorporation. The results from the Salmonella assay indicate that while the bulk of the solvent extractable organics in both wastes was rendered non-mutagenic, the mutagenic potential of the organic compounds in the acid fraction from the storm-water runoff impoundment sludge amended soil was increased. The results from the Aspergillus assay of both wastes indicate that the mutagenic potential of all three fractions was eventually reduced to a level that would be considered non-mutagenic. Thus, while degradation may have increased the mutagenic potential of specific organic compounds that were residual in the soil, the overall effect of degradation was to reduce the weighted activity of the waste amended soil.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00149325
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